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the LED display of the CPU module. For example, if the fault code is 40, the LED
screen will display information as follows:
Fault information on LED screen and remedies:
CPU and I/O
Module
Indication Remedy
No fault -
CPU model does not agree
with software. Check that
the PLC is authorized.
Contact your distributor
CPU Local expansion bus
error
Check the connection
between local rack modules.
of the local rack module is
consistent with that in the
software.
Module error
Check whether the local
rack module reports a fault,
and check the detailed fault
information in the software.
High-Speed I/O Indication Remedy
High-speed input error
Check the detailed
fault information in the
software.
High-speed input alarm
Check the detailed
fault information in the
software.
High-speed output error
Check the detailed
fault information in the
software.
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